Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request From: "Craig R. Watkins" Newsgroups: comp.dcom.telecom Subject: Re: Basic Questions About Telephones Message-ID: <10933@accuvax.nwu.edu> Date: 15 Aug 90 14:16:09 GMT Sender: news@accuvax.nwu.edu Organization: HRB Systems Lines: 20 Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 10, Issue 573, Message 9 of 12 In article <10881@accuvax.nwu.edu>, Julian Macassey writes: > You are right, a telephone line requires two wires or "one > pair" in telco speak. The first pair are the Red and Green and the > second pair are the Yellow and Black. For a one line installation, you > only need to connect the first pair (Red and Green). During the 70's (days of four-prong phone jacks), Rochester Telephone seemed to wire most (single-line) phones with the Yellow/Black positions on the jacks. We all assumed that this was simply to discourage would-be amateur telephone installers. I've never seen the non-standard wiring on RJ-11s unless there were two lines involved. Craig R. Watkins Internet: CRW@ICF.HRB.COM HRB Systems, Inc Bitnet: CRW%HRB@PSUECL.Bitnet +1 814 238-4311 UUCP: ...!psuvax1!hrbicf!crw